SD Raw Recovery Video Issue

[Philip Shaw]

Good morning. I received a 512GB SanDisk SD card that was being used in a Canon G7x mark ii camera and had thousands of pictures and videos on it. The customer put it in a Nikon D5000 camera and it said it needed to be formatted which she did. She took about 1,100 pictures and then realized she had a problem. I did a raw recovery using R-Studio and got over 6,000 pictures and thousands of videos. The pictures looked fine but none of the videos opened. I ran another raw recovery on the PC3K and had similar results. When I look at the mp4 videos in HexEdit everything at the beginning looks normal and it indicates it was taken with a Canon PowerShot G7 X Mark II. None of the dozens of videos I tried to open work and I sent two to the customer and she couldn't open them either. The SD card is formatted FAT 32 now but she didn't know how it was originally formatted. If it was exFAT before could that be the problem with the larger files? Any suggestions?

Thanks.

[Data Recovery Guru]

The primary issue for the results on the video is fragmentation.

Try Klennet Recovery or Disk Drill. May fair better, but probably not hugely better.

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On Tue, Jun 2, 2026, 8:38 AM Philip Shaw <shawcomput...@gmail.com> wrote:

Good morning. I received a 512GB SanDisk SD card that was being used in a Canon G7x mark ii camera and had thousands of pictures and videos on it. The customer put it in a Nikon D5000 camera and it said it needed to be formatted which she did. She took about 1,100 pictures and then realized she had a problem. I did a raw recovery using R-Studio and got over 6,000 pictures and thousands of videos. The pictures looked fine but none of the videos opened. I ran another raw recovery on the PC3K and had similar results. When I look at the mp4 videos in HexEdit everything at the beginning looks normal and it indicates it was taken with a Canon PowerShot G7 X Mark II. None of the dozens of videos I tried to open work and I sent two to the customer and she couldn't open them either. The SD card is formatted FAT 32 now but she didn't know how it was originally formatted. If it was exFAT before could that be the problem with the larger files? Any suggestions?

Thanks.

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[Desert Data Recovery]

I am confused. So she had 1000s of pictures on the card BEFORE formatting it? Then formatted it and took 1100 more pictures? FAT32 has a max file size of 4GB, so I assume the videos were on a different format.

To view this discussion visit https://groups.google.com/d/msgid/datarecoverycertification/CAHoXmq%3DUp%3DLQaEBNPMVfZur_ULfiYL_RavMbLqR0L%2B2dJdUmCA%40mail.gmail.com.

[Philip Shaw]

That's why I thought it might have been formatted for exFAT originally. Even 256kb videos won't open, though.

To view this discussion visit https://groups.google.com/d/msgid/datarecoverycertification/CAOasWzunOT66ZzsWE5vcM8m1O4VYhBd9db%3DxQdDdt%3DMDuoViug%40mail.gmail.com.

[Anonymous]

Hi can you a send 2 copy of the file and what is the movie format?

Thanks

To view this discussion visit https://groups.google.com/d/msgid/datarecoverycertification/CAOasWzunOT66ZzsWE5vcM8m1O4VYhBd9db%3DxQdDdt%3DMDuoViug%40mail.gmail.com.

[juanvd...@gmail.com]

I used GPr64 in the past with good success on all the new camera video formats and I see that it is part of Diskdrill now, RStudio and any other carving tool does not work for these video files.

https://www.cleverfiles.com/goprorecovery.html

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[RecuperoDati299]

the point Is not the filesystem 

the point is the fragmentation 

You anyway will do a RAW recovery. At that point the filesystem won't matter anymore 

One guy out there worked on a software for enhanced raw recovery for photo and videos that would fix the fragmentation 

Need to check on LinkedIn , though he is the developer of ZAR

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Il giorno 2 giugno 2026, alle ore 14:38, Philip Shaw <datarecovery...@googlegroups.com> ha scritto:

Good morning. I received a 512GB SanDisk SD card that was being used in a Canon G7x mark ii camera and had thousands of pictures and videos on it. The customer put it in a Nikon D5000 camera and it said it needed to be formatted which she did. She took about 1,100 pictures and then realized she had a problem. I did a raw recovery using R-Studio and got over 6,000 pictures and thousands of videos. The pictures looked fine but none of the videos opened. I ran another raw recovery on the PC3K and had similar results. When I look at the mp4 videos in HexEdit everything at the beginning looks normal and it indicates it was taken with a Canon PowerShot G7 X Mark II. None of the dozens of videos I tried to open work and I sent two to the customer and she couldn't open them either. The SD card is formatted FAT 32 now but she didn't know how it was originally formatted. If it was exFAT before could that be the problem with the larger files? Any suggestions?

Thanks.

--

[Philip Shaw]

Here are two small files.

To view this discussion visit https://groups.google.com/d/msgid/datarecoverycertification/6f3a53635dfaac.ecaab3e57767c8%40gmail.com.

[DiskTuna]

Looking at the start of the file is all fine and dandy, and it does say something but hardly everything. It's a good quick first check, that's all, It's easy enough to jump the chain of boxes and see if it actually references the mdat box.

RAW recovery in R-Studio assumes files are contiguous.

Try Klennet Carver. Use at Windows PC with plenty cores + 2 GB per core.

[DiskTuna]

Both files lack mdat box.

[Philip Shaw]

Klennet is quite expensive and the demo version won't let me verify whether the files are functional. Do you think it is worth it?

To view this discussion visit https://groups.google.com/d/msgid/datarecoverycertification/5aa88627-4c9d-41df-8360-d475c25250c7n%40googlegroups.com.

[juan van der meulen]

I had 99% success with GPR64 now part of Diskdrill under video recovery option, you need to select camera recovery and it paid it self of with one job.

To view this discussion visit https://groups.google.com/d/msgid/datarecoverycertification/CAPG2QkZcVFEAP-GRt_z%2B_uD4t%2BgvoUGQRiho6_uSGRcU9Vua-A%40mail.gmail.com.